IP Library › Granted Patent US 9,880,479
Granted Patent B2
US 9,880,479 · App. 15/404,292 · Granted Jan 30, 2018

Toner, toner stored unit, image forming apparatus, and image forming method

Inventors: Hideyuki Santoh (Shizuoka, JP); Tsuyoshi Sugimoto (Shizuoka, JP); Akinori Saitoh (Shizuoka, JP); Shin Hasegawa (Shizuoka, JP); Suzuka Amemori (Shizuoka, JP); Kohsuke Nagata (Shizuoka, JP); Koh Ohnuma (Shizuoka, JP)
Assignee: RICOH COMPANY, LTD.
G03G9/08702G03G15/08
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Quick Facts
Patent No.
US 9,880,479
App. No.
15/404,292
Granted
Jan 30, 2018
Kind
B2
Abstract

Toner that includes a polyester resin, fluorine and aluminum. The toner satisfies formulae (1) and (2), 1.00≧ AB/B ≧0.50  (1) 0≦( A−AB )/ A ≦0.25  (2) where A represents an area where the fluorine exists measured by Energy Dispersive X-ray Spectroscopy (EDS), B represents an area where the aluminum exists measured by Energy Dispersive X-ray Spectroscopy (EDS) and AB represents an overlapping area between A and B. Toner stored unit, image forming apparatus, and image forming method.

Claims (22)

1. A toner comprising:

a polyester resin, fluorine and aluminum,

wherein the toner satisfies formulae (1) and (2),

1.00 ≧AB/B≧ 0.50  (1)

0≦( A−AB )/ A≦ 0.25  (2)

where A represents an area in which the fluorine exists as measured by Energy Dispersive X-ray Spectroscopy (EDS), B represents an area in which the aluminum exists as measured by Energy Dispersive X-ray Spectroscopy (EDS), and AB represents an overlapping area between A and B.

2. The toner of claim 1 , wherein the toner further comprises an inorganic laminar compound having the fluorine on a surface thereof.

3. The toner comprising of claim 2 , wherein the inorganic laminar compound is one in which organic ions are at least partially substituted for ions present between layers.

4. A toner stored unit which stores the toner of claim 1 .

5. An image forming apparatus, comprising:

an image bearer;

an electrostatic latent image former to form an electrostatic latent image on the image bearer;

a developing unit containing a toner and configured to develop the electrostatic latent image formed on the electrostatic latent image bearer to form a visible image;

a transfer unit to transfer the visible image onto a recording medium; and

a fixing unit to fix the visible image onto the recording medium

wherein the toner is the toner of claim 1 .

6. An image forming method, comprising:

forming an electrostatic latent image on an image bearer;

developing the electrostatic latent image formed on the electrostatic latent image bearer with toner to form a visible image;

transferring the visible image onto a recording medium; and

fixing the visible image onto the recording medium

wherein the toner is the toner of claim 1 .

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 12, 2017
From: SANTOH, HIDEYUKI; SUGIMOTO, TSUYOSHI; SAITOH, AKINORI; HASEGAWA, SHIN; AMEMORI, SUZUKA; NAGATA, KOHSUKE; OHNUMA, KOH
To: RICOH COMPANY, LTD.
Reel/Frame 040953/0215 →
Priority Claims (1)
JP 2016-003640 · Jan 12, 2016 · national
Continuity (1)
Related Publication 20170199476A1 · Jul 13, 2017